ppc: socrates: Drop use of DM_PCI

Now that DM_PCI is always enabled we don't need to check it. Drop this
old code.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/socrates/socrates.c b/board/socrates/socrates.c
index 3444af6..3ba2fbb 100644
--- a/board/socrates/socrates.c
+++ b/board/socrates/socrates.c
@@ -53,7 +53,7 @@
 	}
 	putc('\n');
 
-#if defined(CONFIG_PCI) || defined(CONFIG_DM_PCI)
+#if defined(CONFIG_PCI)
 	/* Check the PCI_clk sel bit */
 	if (in_be32(&gur->porpllsr) & (1<<15)) {
 		src = "SYSCLK";
@@ -130,9 +130,7 @@
 			       &flash_info[CONFIG_SYS_MAX_FLASH_BANKS - 1]);
 	}
 
-#if defined(CONFIG_DM_PCI)
 	pci_init();
-#endif
 
 	return 0;
 }